   (-> (Codecs.)
     (.add None/INSTANCE)))
 
-(defn register-codec!
+(defn register-codec
   "Registers a codec for use.
 
    `codec` should be the result of {{make-codec}}."
   [codec]
   (.add codecs codec))
 
-(register-codec!
+(register-codec
   (make-codec
     {:name :edn
      :content-type "application/edn"

                 (throw (IllegalArgumentException.
                          "Can't decode fressian. Add org.clojure/data.fressian to your dependencies."))))}))

(register-codec!
  (make-codec
    {:name :json
     :content-type "application/json"

                            (str "Invalid edn-encoded data (type=" (class data) "): " data)
                            e)))))}))

(register-codec
  (make-codec
    {:name :fressian
     :content-type "application/fressian"
